Reflection, Transmission, and Plasma Frequency
Does anyone have a good, clear explanation of why and how this works? I don’t understand the following. Say you have a piece of metal with a plasma frequency $omega_p$. This is like a resonant...
View ArticleWave propagation in 2D metal cavity
I would like to know there is an analytic solution for the propagation of electromagnetic waves in metals in a 2D case. The 1D case is well known to lead to a traveling wave with exponential decay...
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Why are gold mirrors yellow?
Why are golden mirrors yellow? Do they add a yellow component to the spectrum or absorb non-yellow components? If they absorb, then why are they used in telescopes being imperfect? If they add a yellow...
View ArticleWhat makes metal change its color during heating?
What happens on atomic and molecular level? Is this true also for non-metals and metalloids?
View ArticleEnhancing of EM waves through a materal or waveguide
I’m wondering whether there are materials for which an incident EM wave would behave as $vec E(z,t)=vec E_0 e^{kappa z}e^{i(kz-omega t)}$ where z describes how far from the surface the fields are and...
View Articlecrystal structure of metals
I am studying solid state physics and I’m a complete newbie in that sense. I know that semiconductors and group IV elements bond themselves in the FCC structure with covalent bonds which satiate the...
View ArticleWhat is “Accumulated plastic strain rate” in Current yield Norton law?
I’m doing FEA of steel under high strain rates and using Elasto-ViscoPlastic material model, with Von-mises yield criterion along with Isotropic hardening. The strain rate sensitivity is addressed by...
View ArticleWhy is the conductor an equipotential surface in electrostatics?
Since the electric field inside a conductor is zero that means the potential is constant inside a conductor, which means the “inside” of a conductor is an equal potential region. Why do books also...
View ArticleModel of the nucleus as fermi gas
I am taking an introductory course in modern physics, and am reviewing some of the exams from previous years. In our course, we studies the Fermi gas model for electrons in a metal. In one of the...
View ArticleWhy are metals worse conductors when heated?
When metals, (such as in circuits), are heated, their ability to conduct electric current is hampered. Why is this? Does the transition towards liquid disrupt a metal’s ability to conduct, or is...
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